231545510021345 has 16 divisors (see below), whose sum is σ = 303015740482560. Its totient is φ = 168823055404224.

The previous prime is 231545510021333. The next prime is 231545510021347. The reversal of 231545510021345 is 543120015545132.

It is not a de Polignac number, because 231545510021345 - 2²⁰ = 231545508972769 is a prime.

It is a super-2 number, since 2×231545510021345² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231545510021347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22545808889 + ... + 22545819158.

It is an arithmetic number, because the mean of its divisors is an integer number (18938483780160).

Almost surely, 2^{231545510021345} is an apocalyptic number.

It is an amenable number.

231545510021345 is a deficient number, since it is larger than the sum of its proper divisors (71470230461215).

231545510021345 is a wasteful number, since it uses less digits than its factorization.

231545510021345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45091628144.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 231545510021345 its reverse (543120015545132), we get a palindrome (774665525566477).

The spelling of 231545510021345 in words is "two hundred thirty-one trillion, five hundred forty-five billion, five hundred ten million, twenty-one thousand, three hundred forty-five".